JPS63152004A - Production of magnetic head - Google Patents

Abstract

PURPOSE:To improve productivity and to stabilize quality at low cost by making a front core block, a back core block and a front plate block bond to integrate them, forming them in resin and cutting them so as to separate into individual magnetic heads. CONSTITUTION:Plural coils 6 are respectively installed in coil insertion grooves 2a of the back core block 5, on which the front core block 4 is placed after positioning, and the block 5 and the block 4 are made to bond with the resin and a bonding material, etc. And the head surface part of the front plate block 3 is positioned on the rear end surface of the front core block 4 and the upper surface rear edge of the back core block 5 and they are made to bond with the resin and the bonding material, etc., to obtain a bonding body 7 by integrating them. The bonding body 7 is set in a forming metallic mold so as to be formed in terms of the resin and cut every specified dimension so as to be separated into individual magnetic heads 9, then the magnetic head 10 is completed by grinding a sliding contact surface 10a in terms of circular arc. Thus, a great number of the magnetic heads, whose quality is stable, can be produced at low cost.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method of manufacturing a magnetic head, and particularly to a magnetic head whose sliding surface is formed of a magnetic core made of a magnetic material and a front plate made of a non-magnetic material. Relating to a manufacturing method.

[Conventional technology]

Conventionally, the manufacturing method for this type of magnetic head was to install the coil in the coil insertion groove of the bank core, then butt the front core and front plate against the back core, bond them with resin, adhesive, etc., and then mold the joined body with resin. This was a method of manufacturing magnetic heads individually by polishing the sliding surface of a magnetic recording medium such as a magnetic tape.

[Problem that the invention seeks to solve]

In the conventional magnetic head manufacturing method described above, the magnetic heads are assembled individually, resulting in low productivity and a tendency to waste materials, making it difficult to mass-produce magnetic heads with stable quality at low cost. The problem was that it was difficult.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to provide a method of manufacturing a magnetic head that can manufacture a large quantity of magnetic heads with stable quality at low cost.

[Means for solving problems]

The method for manufacturing a magnetic head of the present invention includes a method for manufacturing a magnetic head in which a sliding contact surface is formed of a magnetic core made of a magnetic material and a front plate made of a non-magnetic material. a step of gluing and joining a front core block and a front plate block to the back core block after inserting the coil; a step of resin molding a joined body of the back core block, the front core block and the front plate block; A step of cutting the resin molded bodies of the back core block, the front core block, and the front plate block into predetermined dimensions to separate them into individual magnetic heads, and a step of polishing the sliding surfaces of the separated magnetic heads. It is characterized by containing.

[Function] In the method for manufacturing a magnetic head of the present invention, after a plurality of coils are inserted into the coil insertion grooves of a back core block, a front core block and a front plate block are joined to the back core block, and the joined body is resin-molded. , the resin molded body is cut into predetermined dimensions and separated into individual magnetic heads, and the sliding surfaces of the separated individual magnetic heads are polished to manufacture a plurality of magnetic heads at the same time.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 4 is a perspective view showing an example of a magnetic head manufactured by a method of manufacturing a magnetic head according to an embodiment of the present invention.

This magnetic head 10 includes a front core 11 exposed at one end side of a sliding contact surface 10a of a magnetic recording medium, a bank core 12 joined to a lower part of the front core 11, and a sliding contact surface 10a of a magnetic recording medium.
The front plate 13 largely exposed on the other end side of a, the coil 6 (see FIG. 3 1al) housed in the coil insertion groove 2a (see FIG. 2) of the back core 12, and these magnetic heads 10. The main part thereof is composed of a resin part 14 which forms the outer shape of the magnetic head 10 by resin-molding the components thereof.

Note that in FIG. 4, reference numeral 15 indicates a terminal pin connected to the coil 6. Also, the code g is the front core 11
It shows the magnetic gap formed between them.

Next, a method of manufacturing a magnetic head according to an embodiment of the present invention for manufacturing such a magnetic head 10 will be described.

First, as shown in Fig. 1 + a), a plate-shaped magnetic material block 1 made of magnetic material such as ferrite is prepared, and as shown in Fig. 1 (bl
A plurality of magnetic gap forming grooves 1a are drilled in pairs at predetermined intervals as shown in FIG. do.

Next, the magnetic material block 1 is cut in the horizontal direction indicated by a dashed line &'ia so that the magnetic gap g is exposed on the bottom surface, and then the magnetic material block 1 is cut in a predetermined dimension in the vertical direction indicated by a dashed dotted line. Then, a plurality of front core blocks 4 (see FIG. 3 1al) are manufactured.

On the other hand, in the case of the back core block 5 as well, FIG.
A magnetic material block 2 similar to the plate-shaped magnetic material block 1 shown in a) is prepared, and a plurality of coil insertion grooves 2a are bored in pairs at predetermined intervals as shown in FIG. Thereafter, a plurality of back core blocks 5 (see FIG. 3 [al]) are manufactured by cutting into predetermined dimensions in the vertical direction indicated by the dashed line C.

Next, as shown in FIG. As shown in Figure 3(b),
A plurality of coils 6 are respectively installed in the coil insertion grooves 2a of the back core block 5, and the front core block 4 is positioned and placed on the back core block 5 using a jig or the like and bonded with resin, adhesive, etc. The front end face of the front plate block 3 is positioned on the rear end face of the front core block 4 and the rear end edge of the upper face of the back core block 5 using a jig or the like and joined with resin, adhesive, etc., and a joined body 7 is made by integrating these parts. shall be.

Next, back core block 5. Front core block 4. The joined body 7 in which the front plate block 3 and the plurality of coils 6 are integrated is placed in a mold and resin molded to form a resin molded body 8 as shown in FIG. 3 fcl.

Then, as shown in FIG. 3+dl, the resin molded body 8 is cut into predetermined dimensions and separated into individual unpolished magnetic heads 7 and 9, and the sliding surface 10a of each unpolished magnetic head 9 is arc-polished. As a result, a magnetic head 10 as shown in FIG. 4 is completed.

〔Effect of the invention〕

As explained above, according to the present invention, the front core block, back core block, and front plate block are bonded and integrated, then resin molded, and the resin molded body is cut to separate into individual magnetic heads. Therefore, a plurality of magnetic heads can be manufactured at the same time, resulting in excellent productivity, and there is also an effect that magnetic heads with stable quality can be manufactured in large quantities at low cost without wasting materials.

[Brief explanation of the drawing]

FIG. 1 fat to +c+ is a perspective view showing the sequential manufacturing steps of a front core block in a method for manufacturing a magnetic head according to an embodiment of the present invention. FIG. FIG. 3 is a perspective view showing one manufacturing process of the back core block; FIGS.
FIG. 2 is a perspective view showing an example of a magnetic head manufactured by the method for manufacturing a magnetic head according to the present embodiment. In the figure, 1.2. Magnetic material block, 1a.. Magnetic gap forming groove, 2a.. Coil insertion groove, 3.. Front plate block, 4.. Front core block, 5.. Back core block. 6... Coil, 7... Joined body, 8... Resin molded body, 9... Unpolished magnetic head, 10... Magnetic head, 10a... Sliding surface, 11... Front core , 12... Back core, 13... Front plate, 14... Resin part, 15... Terminal bin.

Claims (1)

[Claims] A method for manufacturing a magnetic head in which a sliding surface is formed of a magnetic core made of a magnetic material and a front plate made of a non-magnetic material, wherein a plurality of coils are inserted into coil insertion grooves of a back core block. a step of later bonding a front core block and a front plate block to the back core block; a step of resin molding a joined body of the back core block, the front core block, and the front plate block; and a step of resin-molding the joined body of the back core block, the front core block, and the front plate block; , comprising the steps of: cutting the resin molded bodies of the front core block and the front plate block into predetermined dimensions to separate them into individual magnetic heads; and polishing the sliding surfaces of the separated magnetic heads. A method of manufacturing a magnetic head.